citizen and the obama administration agreed to show congress the legal opinion justifies such attacks. the white house argues that from strikes effectively target america's enemies but critics cite heavy civilian casualties and the u.s. relies on them too much. >> the drone is the only weapon that really frightened insurgents. it is ineffective. we cannot possibly kill these people one at a time and expect to come out on top. >> they are clearly not invincible. iranian tv has shown these pictures that come from a u.s. surveillance drone they captured two years ago. it's interesting timing. >> with me here in the studio is a former adviser to president obama's special up is that it to afghanistan and pakistan. you understand this area of the world very closely. how important is this to the national security? >> it has killed a number of al qaeda leaders but it has not decimated the organization completely. it has pushed them to move into other areas of the middle east. also, at a very high political cost. it does cause an enormous amount of anger in pakistan which has helped to spread